So, I noticed, that this thread exists just a couple of days ago. Since then, I made a list of things, which, in my opinion, shoukd be tweaked.
1. I've seen tour post, showing spoilers for some balance chabges, and I like all of them except making Horseshoe a gold chest item and Fledgling Wings - a sky chest item. In my opinion, during normal gameplay (by playing normal terraria without various mods or journey mod's tweaks) wings shoild be hardmode-exclusive item, because Soul of Flight which are required in pretty much every set of wing in the game is a hardmode material. Also, because of having wings pre-hardmode hirseshoe and hirseshoe baloons will become much less useful. So, what's my idea of fixing that? You sad, that you only add wings because various people who collect items asked you. And I suggest you to make them exclusive for "for the worthy" seed. Then collectors will be able to get them, journey mode players won't be sad because of possible nerf to that set of wings, and terraria's belief that wings must be hardmode-exclusive will stay. I think that horseshie should be kept in gokd chests then, considering that in my opinion it is the best item from those chests.
2. I support Jota Bame's suggestion of fixing true melee that he posted here. Here is a link in case you missed that.
I can't really say I agree. If a new player was to use a bow or gun that explicitly says shoots multiple bullets, they'd expect the same multiple bullets to have the same effect. I don't think limiting an ammunition's special effect to a single shot/arrow works. An appropriate fix to the...
forums.terraria.org
3. I think nobody covered this here, but are you going to rebalance prefixes? Because some of them are much more powerful, that other. For example, in expert mode you can get 24% damage or 24% crit. chance, but only 24 defense, which equals only 18 damage reduction. As far as I still use warding prefix (because I am awfil at dodging), a lot of people even believe, that defense stat is exstremely useless in general. I am not the best balancer, but maybe warding should provide defense in persentage. Than it will give 24% defense, and that will make this more useful throughout the game, since you defense stat will be increased by various armors and other accessories and as a result, this bonus will be more useful throughout the entire game (like it is with menacing). Also, perhaps you shoukd make 1 defense - 1 damage reduction for expert worlds and 1 defense - 2 damage reduction for master worlds too, but that may end up being op.
4. After you nerfed Reaver Shark, mobody fishes for it. Because niw it isn't useful at all (gold pickaxe is extremely easy to get). I know, that my suggestoon will break the progression a bit, but it is the only way to make people want to fish for this pickaxe - let it to mine hellstone. I will repat, that I know, that it breaks progression, but in is still worse rhan before, since you still have to craft Molten Pickaxe to mine Palladium ore/ Cobalt ore.
5. This is not fully a balance change, but I still thing, that it should happen. So, all WoF's drops are somewhat steampunk themed and then you add Firecracker, which doesn't fit that concept. My solution: to make it craftable from hellstone (because Snapthorn is not powerful enough agains underworld creatures) and add new unique one for WoF.
6. I read that you made Flanewalker boots, before thinking of Terraspark ones, but I still think, that they have a chance of being good by played. Make their fire particles deal damage. And that's all. It is quite an easy fix, that will give a huge impact on these boots usefulness.
7. Buff Arkhalis. Other developer's weapons like Red's Throw is actually useful throughout the game, but Arkhalis is just "Oh cool, I got a rare item. Time to put it in chest and never use" type of weapon.
These might not be the only things I'd like ti fix, but at least thesebare ones which I find the most important ones.
Edit: I was inattentive enough to forget to give the link.